Problem FTB Modpacks using up 90% of CPU

[PaulHotel]

I have been running into an issue with several modpacks where it freezes often and uses up to 90% of my CPU.
Screenshot:

Computer Specifications:
Intel Core i7-6700 CPU @ 3.40 GHz
16 GB of RAM

 

[Xenulus]

I've seen this issue before but haven't found any solutions, other than the universal suggestion of just allocating more RAM to the game.

 

[Henry Link]

How much RAM do you actually allocate to the pack? Also, have you looked into tuning the java garbage collector yet?

 

[grandrolf]

A log could help + more information about your system.

Java version?
Have you changed any java arguments?
Antivirus software that could mess with stuff?

If not sure how to check other running process on the machine, do this:

Open PowerShell and type this:
get-process | Out-File "$ENV:USERPROFILE\desktop\process.txt"

and:
get-process *java* | select * | Out-File "$ENV:USERPROFILE\desktop\javaprocess.txt"

This will create 2 txt-files on your desktop, open and copy/paste to paste.feed-the-beast.com and share the links.

 

[pmfman]

Its possible that its a java problem, or a hardware problem. If your ram (or allocated ram within the game) or gpu can’t keep up, the cpu will pick up the slack. I suggest allocating more ram first to see if it fixes anything since it is the easiest fix